Crust Punk / Speed Metal , it's quite good. There are two cover color versions, one being green and one yellow if I'm not mistaken. This aint too rare but not too common I think. I dont know if one color is more rare or not. Maybe you can find it for cheap in Belgium.
I dont understand where the Black Metal should be, nothing in the lyrics, appearance, music.

X-creta was considered more of a crossover band then. Also the band was active in both the metalscene and the punkscene.
The record isn't too rare, I see a few each year here in Belgium for normal prices.

The singer by the way is now the cartoonist for a big Flemish magazine, kinda like Newsweek.

releases or links, this band sounds intersting? my old band HAGBORN was going for a more punk black metal crossover sound. some here might apreciate as its now in the grave. anyone no more bands similar to this style?